How to put cursor in the middle of screen when replacing words? I have to see the next few lines to know replace or not, but the word always sit in the bottom of the screen.
Sounds like you're looking for the 'scrolloff' setting. :help 'scrolloff'will provide details on this. It allows you to keep a certain number of lines on the screen at the same time. If you set it to an outrageously high value, it will keep the cursor centered vertically on the screen.
-tkc